The Comprehensive School Mathematics Program (CSMP) is a program of CEMREL, Inc., one of the national educational laboratories and is funded by the National Institute of Education. Its major purpose is the development of curriculum materials in mathematics for grades K-6. Beginning in September, 1973, CSMP began an extended pilot trial of its Elementary Program. This report is an attempt to summarize, in a reasonably non-technical way, the information collected during the first year of the evaluation. Included are: (1) descriptions of trial sites; (2) results of test data including standard content, cognitive skills, and CSMP content; (3) teacher reactions to CSMP; (4) costs; (5) external review; (6) school decisions regarding continued use; and (7) a discussion of the pilot trial. (RH)